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Table 1 Features on CT, MRI and ultrasound

From: Primary hepatic perivascular epithelioid cell tumors: imaging findings with histopathological correlation

Imaging features

Total, n = 22 (%)

Right lobe

13 (59.1)

Round and oval

21 (95.5)

Well-defined margin

19 (86.4)

Heterogeneous

20 (90.9)

Fat

9 (40.9)

Necrosis

8 (36.4)

Hemorrhage

3 (13.6)

Calcification

2 (9.1)

Dysmorphic vessels

17 (77.3)

Features on non-enhanced CT

Total, n = 13 (%)

Low attenuation

13 (100)

Features on non-enhanced MRI

Total, n = 7 (%)

T1w low SI

6 (85.7)

T1w high SI

1 (14.3)

Fat-suppressed T2w low SI

1 (14.3)

Fat-suppressed T2w high SI

6 (85.7)

Features on enhanced CT and/or MRI

Total, n = 21 (%)

Arterial enhancement

20 (95.2)

Arterial enhancement with fast washout

9 (42.9)

Arterial enhancement with slow washout

7 (33.3)

Arterial enhancement with persistent enhancement in the late phases

4 (19.0)

Unspecified heterogeneous enhancement

1 (4.8)